> ## Documentation Index
> Fetch the complete documentation index at: https://docs.polygon.technology/llms.txt
> Use this file to discover all available pages before exploring further.

# Get Started

> Build cross-chain applications on AggLayer-connected CDK chains.

## Build Cross-Chain Applications on CDK

AggLayer is built into every Chain Development Kit (CDK) chain. You can work with AggLayer's cross-chain capabilities in development and production without setting up separate interoperability infrastructure.

### What you can build on CDK chains

* **Atomic cross-chain operations**: Execute operations across multiple chains in a single transaction
* **Unified asset management**: Build applications where users' assets work across all supported chains
* **Cross-chain smart contracts**: Create contracts that trigger actions and transfer value across different networks
* **Multi-chain interfaces**: Build UIs that abstract chain selection away from the user

## Next steps

* **[Supported chains](/interoperability/agglayer/supported-chains/)**: See which chains are connected to AggLayer, with RPC endpoints and chain IDs.
* **[Integrations](/interoperability/agglayer/integrations/)**: Use Bridge Hub or the AggKit Bridge Service to query bridge data, generate claim proofs, and automate claiming across chains.